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Alpine 3800 Series I/O Modules
FM-24SFi Module
Figure 76 shows the FM-24SFi module.
Figure 76: FM-24SFi module
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Module status LED
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100 Mbps ports
with status LEDs
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FM-24SFi
The FM-24SFi module has 24 100 Mbps Ethernet ports, using standard MT-RJ connectors. The FM-24SFi
module supports 100BASE-FX in single mode only.
The default configuration of the FM-24SFi module is as follows. All ports:
• Are added to the default VLAN as untagged.
• Inherit the properties of the default VLAN (protocol type, VLANid, and so forth).
• Operate in 100 Mbps, single mode. Half-duplex mode is not supported.
The total optical system budget for the FM-24SFi module is 11 dB. Measure cable plant losses with a
1310 nm light source to verify that your cable plant losses are within the optical budget. Table 53
describes the optical specifications for the FM-24SFi module
.
Table 53: FM-24SFi optical interface specifications
Parameter
Minimum
Typical
Maximum
Transceiver
Optical output power
-20 dBm
Center wavelength
1510 nm
-14 dBm
Receiver
Optical input power sensitivity
-31 dBm
Optical input power maximum
Operating wavelength
-8 dBm
1510 nm
General
Total system budget
11 dBm
LEDs
The FM-24SFi module has the following LEDs:
• Module status
• Port status
For information about the LEDs and their activity on the FM-24SFi module, see “I/O Module LEDs” on
page 177.
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Extreme Networks Consolidated Hardware Guide